1 | #include "stm32f4xx.h"
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2 |
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3 | void TIM1_UP_TIM10_IRQHandler(void) {
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4 | TIM_ClearITPendingBit(TIM1, TIM_IT_Update);
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5 | }
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6 |
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7 | int main(void) {
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8 | GPIO_InitTypeDef gpioInit;
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9 | TIM_TimeBaseInitTypeDef timTimeBaseInit;
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10 | NVIC_InitTypeDef nvicInit;
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11 |
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12 | // PD12, PD13, PD14, PD15 = LEDs
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13 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
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14 | gpioInit.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
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15 | gpioInit.GPIO_Mode = GPIO_Mode_OUT;
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16 | gpioInit.GPIO_OType = GPIO_OType_PP;
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17 | gpioInit.GPIO_PuPd = GPIO_PuPd_NOPULL;
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18 | gpioInit.GPIO_Speed = GPIO_Speed_100MHz;
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19 | GPIO_Init(GPIOD, &gpioInit);
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20 |
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21 | // PA0 = button input
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22 | RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
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23 | gpioInit.GPIO_Pin = GPIO_Pin_0;
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24 | gpioInit.GPIO_Mode = GPIO_Mode_IN;
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25 | gpioInit.GPIO_OType = GPIO_OType_PP;
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26 | gpioInit.GPIO_PuPd = GPIO_PuPd_NOPULL;
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27 | gpioInit.GPIO_Speed = GPIO_Speed_100MHz;
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28 | GPIO_Init(GPIOA, &gpioInit);
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29 |
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30 |
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31 | // TIM1 setup
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32 | RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
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33 | timTimeBaseInit.TIM_Prescaler = 0;
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34 | timTimeBaseInit.TIM_CounterMode = TIM_CounterMode_Up;
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35 | timTimeBaseInit.TIM_Period = 2532;
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36 | timTimeBaseInit.TIM_ClockDivision = TIM_CKD_DIV1;
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37 | timTimeBaseInit.TIM_RepetitionCounter = 0;
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38 |
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39 |
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40 | nvicInit.NVIC_IRQChannel = TIM1_UP_TIM10_IRQn;
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41 | nvicInit.NVIC_IRQChannelCmd = ENABLE;
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42 | nvicInit.NVIC_IRQChannelPreemptionPriority = 0x0F;
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43 | nvicInit.NVIC_IRQChannelSubPriority = 0x0F;
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44 |
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45 | TIM_TimeBaseInit(TIM1, &timTimeBaseInit);
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46 | NVIC_Init(&nvicInit);
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47 |
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48 | TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);
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49 | TIM_Cmd(TIM1, ENABLE);
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50 |
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51 |
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52 | volatile uint32_t x = SystemCoreClock;
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53 |
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54 | while(1 > 0) {
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55 | if(GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0)) {
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56 | GPIO_SetBits(GPIOD, GPIO_Pin_13);
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57 | } else {
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58 | GPIO_ResetBits(GPIOD, GPIO_Pin_13);
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59 | }
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60 | }
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61 |
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62 |
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63 | }
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